String[] fields = {};
        queryFieldConfig.setApiResponseFields(fields);

        assertNotNull(queryFieldConfig.apiResponseFieldSet);
        assertEquals(0, queryFieldConfig.apiResponseFieldSet.size());
    }

    @Test
    public void test_isApiResponseField() {
        String[] fields = { "field1", "field2", "field3" };
        queryFieldConfig.setApiResponseFields(fields);

        // Test valid API response fields